Vietnam RMK-BRJ American Construction Company South Vietnam Security Chief Badge & Wallet. Brass colored metal badge. ON it is SECURITY CHIEF SOUTH VIETNAM RMK-BRJ 5. It is then seated in a leather wallet. Has been used but still in great shape.
From Wikipedia:RMK-BRJ was an American construction consortium of four of the largest American companies, put together by the United States Navy during the Vietnam War. Its purpose was to build critically needed infrastructure in South Vietnam, so that the Americans could escalate the introduction of American combat troops and materiel into Vietnam. This construction contract, amounting to $1.9 billion (equivalent to $14 billion in 2017 dollars), completed a construction program deemed to be the largest in history up to that time. The consortium derived its name from its four constituent companies: Raymond International, Morrison-Knudsen, Brown & Root, and J.A. Jones.[1]
Over the ten-year life of the contract, RMK-BRJ trained 200,000 Vietnamese workers in construction and administrative trades. The use of a civilian contractor and construction force in an active theater of combat operations was authorized for the first time in U.S. history.